At least 41 police officers were killed today when their bus fell 65 feet off the side of a bridge and in northern Argentina.

The bus was part of a convoy of three carrying police when it crashed near Salta, a city about 932 miles north of Buenos Aires.

It remains unclear why the bus lost control and how it ended up crashing over the bridge.

At least 41 police officers were killed today when their bus in a convoy fell 65 feet off the side of a bridge and in northern Argentina

The bus was one of three carrying police when it crashed near Salta in northern Argentina

Local television images showed rescue crews working around the overturned bus, which authorities said was carrying around 60 people.

'For reasons that are still unknown, the bus lost control while entering the bridge and fell into the creek bed below,' said a statement issued by the National Gendarmerie, a special police force typically charged with patrolling frontier regions.